Texas Instruments TI-86 - Manual (Page 95)

Chapter 5: Function Graphing
83
05FUNC.DOC TI-86, Chap 5, US English Bob Fedorisko Revised: 02/13/01 2:22 PM Printed: 02/13/01 3:01 PM Page 83 of 14
Setting Graphing Accuracy with @ x and @ y
The window variables @ x and @ y define the distance from the center of one pixel to the
center of any adjacent pixel. When you display a graph, the values of @ x and @ y are
calculated from xMin , xMax , yMin , and yMax using these formulas:
@ x =( xMin + xMax ) à126 @ y =( yMin + yMax ) à62
@ x and @ y are not on the window editor. To change them, you must follow the steps above
for changing a window variable value from the home screen or in the program editor. When
you change the values stored to
@ x and @ y , the TI -86 automatically recalculates xMax and
yMax from @ x , xMin , @ y , and yMin , and the new values are stored.
Setting the Graph Format
To display the graph format screen, select FORMT from the
GRAPH menu (6 / (). The graph format settings
define various characteristics of the displayed graph. The
current settings are highlighted.
To change a setting, move the cursor onto the new setting,
and then press b, the same as on the mode screen.
The TI - 86 retains
independent format settings
for each graphing mode.
In DifEq graphing mode, the
graph format screen key
sequence is
6 / &
(Chapter 10).